It's largely a decent anime WWI SRPG (crowded genre), but I personally still haven't finished it because a lot of the maps are frustratingly based around one gimmick or strategy that makes it exceedingly difficult on the first try and a matter of gaming the system on the second. You'll probably get $5 out of it.

Just be prepared to have to replay some battles because of things you couldn't have forseen. There's a lot of enemies that spawn in behind you and bosses that are really only vulnerable to min/maxing your deployment.